The Collaborative International Dictionary
Additionary
Additionary \Ad*di"tion*a*ry\, a.
Additional. [R.]
--Herbert.
Wiktionary
additionary
a. additional - ''http://en.wikipedia.org/wiki/George%20Herbert''.
Usage examples of "additionary".
Common gratitude must be kept alive by the additionary fewel of new courtesies: but generous Gratitudes, though but once well obliged, without quickening repetitions or expectation of new Favours, have thankful minds for ever.